Arsenic (As) contaminated food chains have emerged as a serious public concern for humans and animals are known to affect the cultivation of edible crops throughout world. Therefore, present study was designed investigate individual well combined effects exogenous silicon (Si) sodium nitroprusside (SNP), nitric oxide (NO) donor, on plant growth, metabolites, antioxidant defense systems radish (...

Oxygen activation in all heme enzymes requires the formation of high oxidation states iron, usually referred to as ferryl heme. There are two known intermediates: Compound I and II. The nature heme—and whether it is an FeIV=O or FeIV-OH species—is important for controlling reactivity across groups enzymes. most recent evidence indicates that unprotonated species. For II, not unambiguously estab...

Soil salinity is one of the major abiotic stresses that adversely affect plant productivity and quality. Therefore, an experiment was conducted to investigate the effects of seed treatment with L-arginine on some morphological and physiological parameters of Brassica napus under salinity stress. The seeds of canola were pre-treated with three arginine concentrations (0, 5, and 10µM Arg) for 24 ...

Salt stress is one of the main abiotic factors affecting castor yield. Wild resources can provide important insights for cultivated breeding. However, little known about how wild responds or adapts to salt stress. To understand physiological mechanisms tolerance in castor, morphological and responses two varieties, with contrasted were characterized under Seedlings exposed 0, 50, 100 mM NaCl. T...

Arsenic (As), a metalloid and unnecessary element, is highly toxic to living organisms. It can be accumulated in the environment and enter the food chains through uptake by plants. The present study was designed to assess the response of antioxidant defense system of alfalfa to As (As0, As3+ and As5+) induced oxidative stress at four rates (0, 100, 200, and 300 µM) as a completely randomized de...

Warmer than average summer sea surface temperature is one of the main drivers for coral bleaching, which describes the loss of endosymbiotic dinoflagellates (genus: Symbiodinium) in reef-building corals. Past research has established that oxidative stress in the symbiont plays an important part in the bleaching cascade. Corals hosting different genotypes of Symbiodinium may have varying thermal...

In the environment arsenic (As) can be found mainly as arsenite (AsIII) and arsenate (AsV), which are highly toxic threaten food security. Currently, there is great attention on effects of silicon dioxide nanoparticles (SiO2 NPs) plant development, their ability to restrict As uptake. The results show that two forms negatively impacted aerial dry biomass fruit yield. Silicon content lower in ro...

The effect of salinity on the antioxidative system of root mitochondria and peroxisomes of a cultivated tomato Lycopersicon esculentum (Lem) and its wild salt-tolerant related species L. pennellii (Lpa) was studied. Salt stress induced oxidative stress in Lem mitochondria, as indicated by the increased levels of lipid peroxidation and H(2)O(2). These changes were associated with decreased activ...

Understanding the salinity stress mechanisms is essential for crop improvement and sustainable agriculture. Salinity prepotent abiotic compared with other stresses that decrease growth development, reducing production creating food security-related threats. Therefore, input of metal oxide nanoparticles (NPs) such as zinc (ZnO-NPs) can improve salt tolerance in plants, especially early stage gro...

Iron deficiency is one of the most important factors affecting growth and yield. Utilizing tissue culture technique to study the response of plant to Fe-stress was suggested as a rapid and simple method. Fe-deficiency was explored by cultivating shoots of Borage plantlets on MS media with 27.8, 13.0, 0.0 mg/L FeSO4. Results showed that, severe Fe-deficiency induced yellowing and typical iron de...